Peters



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JOHN S. DAVISON AND NICHOLAS LORTON, OF CRANBERRY, NEW JERSEY.

Letters .Patent No. 81,261, dated August 18, 1868,.l A

*itin .Stimuli refemr tu in time etters moet mn making' mit nf tlg: time TO -LL-TO WHOM IT MAY CONCERN:

Be it known 'that we, Jeun S. Davison and NIeuoLAs Louron, of Cranberry, in the county et' Middlesex, lin the State of New Jersey, have invented a new and improved Air-Tight Cover for Chamhersand other Vessels; and we do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specilication, i-n which- Figure 1 is a perspective view et' our cover or lid.

. Figure 2 is Aa'. perspective view of a wire hoop, which may formpart of our` cover.

lFigure 3 is a representation of circular piece of India rubber, with the rim'turned up, so 4that it can Ibe stretched over the hoop. y

Figure 4 i's a. view of our cover applied to a chamber.

Figure 5 isl a view of a stone-ware pot, with our cover placed on it.

Similar letters ofreterence indicate corresponding parts in the several-figures.

rlhis inventionrelates to an improvement in covers or lids for chambers, crock's, and other vessels.

The object of the invention is to form an air-tight cover which may hc readily and easily used. This object is attained by simply forming a wire ring, and stretching a piece or. sheet of India yrubber over it, thus forming the desired cover.

To enable those skilled in the art to fully understand and construct our. invention, we ivill proceed to describe it. .v

A represents a circular shcet2ot` caoutchouc or India rubbergeither of a. light orl dark color, and onesixteenth or one-thirty-second of an inch in thickness. An edge. is `formed with it, and turned up all around, as shown yat b in iig. 4I This sheet of rubber forms the principal part oi' our invention, and is stretched over a wire ring orhoop, as-shown in iig.3.

When thewire is used in the'construction of the cover, the -upturned edge ofthe India 'rubber is turned down over the wire hoop and cemented fast, as shown in iig. 1, with a circular piece of rubber clothcemented yin the. centre, for the purpose of strengthening the cover in connection with a knob, which knob is secured to the contre of the cover by an extra thickness of rubber or wood on the under s ide, thus making a goed and durable cover.

When this cover isvapplicd to aichainber or other vessel, its elasticity brings it into so close vcontact with the entire surface or top of the vessel or chamber that all air or oifensive odor is eiectually prevented from passing'inror out of the chamber or vessel. f

This lid or cover will be useful in hospitals or the sick-room at home, as it confines any offensive odor within tliechambcr. Noris this the sole purpose for which it can be used, for it can he applied to any vessel needing chair-tight cover. It will be found valuable for preserving butter or lard, or any volatile substance requiringV to be kept from the air.

vHaving thus described our cover and its various uses- What we claim as our invention, and desire to secure by Letters Patent, isp The formation of an air-tight cover, by means of caoutchouc or India rubber, when'stretehed over a hoop as herein described, the whole being arranged as and for the purpose above set forth.

JOHN S. DAVISON, NICHOLAS LORTON.

Witnesses:

inn YAGsn, ELwooD R. Vnz'musus. 

